.page-faq {
  --faq-index-w: 214px;
  --faq-gap: clamp(24px, 4vw, 56px);
  padding-top: clamp(20px, 3vw, 34px);
  padding-bottom: clamp(72px, 10vw, 128px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 30px);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--text-secondary);
}

.page-faq .breadcrumb__item {
  color: var(--text-secondary);
  text-decoration: none;
}

.page-faq .breadcrumb__item:hover,
.page-faq .breadcrumb__item:focus-visible {
  color: var(--fluoro-cyan);
}

.page-faq .breadcrumb__item[aria-current="page"] {
  color: var(--text-primary);
}

.page-faq .breadcrumb__sep {
  color: var(--hairline);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-bottom: clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -140px;
  right: -80px;
  width: min(520px, 70vw);
  height: 340px;
  background: radial-gradient(closest-side, rgba(41, 240, 196, .13), rgba(255, 106, 43, .05) 55%, transparent 78%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--signal-orange);
}

.page-faq .faq-hero h1 {
  max-width: 20ch;
  margin: 0 0 18px;
  font-size: clamp(27px, 4.8vw, 50px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--text-primary);
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.8;
  color: var(--text-secondary);
}

/* ---------- 首屏节奏带 ---------- */
.page-faq .faq-quick {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 3.5vw, 34px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-quick__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 16px 17px;
  background: var(--deep-panel);
}

.page-faq .faq-quick__num {
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--mist-cyan);
}

.page-faq .faq-quick__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--text-secondary);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 13.5px;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text-primary);
  border-left-color: var(--fluoro-cyan);
  background: rgba(41, 240, 196, .06);
}

.page-faq .faq-index__n {
  font-size: 11px;
  color: var(--fluoro-cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding-top: clamp(24px, 3.5vw, 36px);
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-sec--last {
  border-bottom: 1px solid var(--hairline);
  padding-bottom: clamp(24px, 3.5vw, 36px);
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-faq .faq-split__main {
  min-width: 0;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-q {
  margin: 0;
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 17px 4px 17px 0;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  text-align: left;
  color: var(--text-primary);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-faq .accordion__trigger:hover {
  color: var(--mist-cyan);
}

.page-faq .faq-q__num {
  flex: none;
  width: 28px;
  padding-top: 3px;
  font-size: 11.5px;
  color: var(--text-secondary);
  transition: color var(--dur) var(--ease);
}

.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__num {
  color: var(--fluoro-cyan);
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .accordion__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--text-secondary);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .accordion__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .accordion__icon::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::before {
  background: var(--fluoro-cyan);
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: scaleY(0);
}

.page-faq .accordion__panel {
  padding: 4px 8px 24px 42px;
  border-bottom: 1px solid var(--hairline);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-secondary);
}

.page-faq .accordion__panel[hidden] {
  display: none;
}

.page-faq .accordion__panel p {
  margin: 0 0 10px;
  max-width: 58ch;
}

.page-faq .accordion__panel p:last-child {
  margin-bottom: 0;
}

.page-faq .accordion__panel .link-more {
  color: var(--fluoro-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 240, 196, .35);
}

.page-faq .accordion__panel .link-more:hover {
  border-bottom-color: var(--fluoro-cyan);
}

/* ---------- 排查步骤 ---------- */
.page-faq .faq-steps {
  counter-reset: step;
  margin: 12px 0 12px;
  padding: 0 0 0 12px;
  list-style: none;
  border-left: 1px solid var(--hairline);
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 11px;
  max-width: 56ch;
}

.page-faq .faq-steps li:last-child {
  margin-bottom: 0;
}

.page-faq .faq-steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 8px;
  top: 3px;
  padding-right: 5px;
  background: var(--night-pitch);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--fluoro-cyan);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-faq .faq-figure--wide {
  margin-top: clamp(24px, 3.5vw, 36px);
}

.page-faq .faq-figure--wide img {
  max-height: 380px;
  object-position: center;
}

.page-faq .faq-figure__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .01em;
  color: var(--text-secondary);
}

/* ---------- 兜底帮助区 ---------- */
.page-faq .faq-help {
  padding: clamp(20px, 3vw, 30px);
  background: var(--deep-panel);
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--fluoro-cyan);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-faq .faq-help__lede {
  margin: 0 0 18px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.7;
  color: var(--text-primary);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-help__k {
  padding-top: 4px;
  font-size: 11.5px;
  color: var(--signal-orange);
}

.page-faq .faq-help__v {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.page-faq .faq-help__v .link-more {
  color: var(--fluoro-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 240, 196, .35);
}

.page-faq .faq-help__v .link-more:hover {
  border-bottom-color: var(--fluoro-cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .58fr);
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-quick {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 76px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
    padding-right: 4px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    white-space: normal;
  }

  .page-faq .accordion__trigger {
    font-size: 16.5px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .54fr);
    gap: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .accordion__trigger,
  .page-faq .accordion__icon::before,
  .page-faq .accordion__icon::after,
  .page-faq .faq-q__num {
    transition: none;
  }
}